My apologies to the board for mis-quoting Dave McCallum, I own the DVD's & book. It's been a few years since I repaired my case, but I truly wouldn't have believed he would have used 200 watts. I stand corrected; and hope my brain's not fading too fast.
It's the other life experience with electricity that probably influenced my conclusion. I would be wary of leaving any cord within that proximity to 200 watts for 8 hours in a closed up space; and certainly not unattended; but I assume many have successfully done so. I wouldn't use a plastic lampholder base, ever. My husband's the in high voltage electrical field, I was in the industrial engineering field myself.